Deflector for fans.



PATENTED NOV. 21, 1905.

G. L. THOMPSON. DEFLEOTOR FOR FANS.

APPLICATION FILED .TUN"10,1905.

UNITED STATES PATENT OFFIOE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed JuneIO, 1905. Serial No. 284,867.

' To all whlom it Wmy concern.-

Be it known that I, GEORGE L. THOMPSON, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Deflectors for Fans, of which the following is a specification.

One object of my invention is to provide an attachment for mechanically or electrically driven fans which shall break up the single moving body of air ordinarily delivered into a number of currents flowing at different angles to the axis of revolution of said fan.

Another object of the invention is to provide a device for securing the above-desired end which shall be of simple and inexpensive construction and which, if desired, can be adjusted to vary the angles of flow of the air-currents. Ifurther desire to so construct the deflector that it may be conveniently attached to the guard usually used on electric fans, although, if desired, it may be supported directly from the frame of the electric motor or from any other machine for driving the fan.

These objects I attain as hereinafter set forth, reference being had to the accompany ing drawings, in which- Figure 1 is a side elevation showing an electric fan and illustrating in section my deflector as applied thereto. Fig. 2 is a front elevation of the preferred form of my deflector.

' Fig. 3 is a front elevation of a sheet of metal,

showing the lines of the variouscuts and bends necessary to produce the finished article shown in Fig. 2. Fig. 4 illustrates the sheet of metal as cut for the construction of a special form of my deflector; and Fig. 5 is a side elevation illustrating a device applied to my deflector, whereby the angles of the vanes thereof may be adjusted.

In carrying out my invention I provide a sheet of metal A, usually circular in outline, and in addition to forming certain openings a and a. therein also make a series of curved cuts, which are preferably concentric, as indicated by the lines a in Fig. 3. In the present instance there are two sets of these cuts, one on each side of a vertical line passing through the center of the sheet A, and, as shown in Fig. 2, the various sections formed by the above cuts are bent up from the surface of the sheet, so that two sets of vanes a and (0*, are formed, each preferably at different angles to the plane of the sheet A, from which they were formed. The vanes a are so bent that they lie in planes inclined to the plane of the sheet at angles less than ninety degrees, while the vanes 60* of the other set are inclined to the plane of the sheet similarly to the vanes a, but at an angle or angles greater than ninety degrees. By this constructionI am enabled to produce a very simple and inexpensive device which may be attached to the wire or other guard B ordina rily used on an electric fan, such as is indicated at O, there being provided for purposes of attachment certain fastening devices a which engage said guard.

When the fan is in operation, it will be seen that a portion of the air delivered therefrom is permitted to pass through the openings 6/ and a of the deflector in lines practically parallel to the axis of the fan. The greater part of the remainder of the air-body is broken up into a number of sheets or smaller bodies of air by means of the vanes a and (0*, and these bodies flow at different angles to the axis of the fan, causing a circulation and distribution of air, which avoids the objectionable results invariably noted when a mechanical fan is permitted to discharge its air in a single restricted current.

If desired, material maybe economized and practically the same results may be obtained by cutting or punching crescent-shapedsections from the sheet of material from which my deflector is preferably made, as indicated at a in Fig. I, and it will be understood that the direction in which currents of air are delivered may be varied by the simple process of bending the various vanes a and a at the desired angles to the plane of the deflector. This bending, while easily done by hand or machine, may also be quickly and conveniently accomplished by means of the device shown in Fig. 5, in which I provide two rods (Z and cl, loosely attached to the outer edges of the various blades c and (4* by means of rings or clips d. These rods have their adjacent ends oppositely threaded and engaged by a nut or turnbuckle D, having suitable threads. By means of this nut it will be seen that the inclination of both sets of these vanes may conveniently and quickly be simultaneously adjusted.

While I have shown my deflector as used in connection with a fan, it is to be understood that it may be employed to direct the flow of a current of air such as would be delivered from an air-duct without departing from my invention.

I claim as my invention 1. A deflector consisting of a supportingframe having a plurality of sets of vanes of relatively flexible sheet material, adjustable by bending to direct a body of air in lines at different angles to the plane of the deflector, substantially as described.

2. A deflector consisting of a supportingframework having integral sets of vanes on opposite portions of the same face, the vanes of the sets being inclined at different angles to the plane of the deflector, substantially as described.

3. A deflector consisting of a sheet-metal piece having integral portions bent at an angle to its plane so as to form deflecting-vanes, substantially as described.

at. A deflector consisting of a plate of sheet metal having a series of curved cuts, the pieces formed by said cuts being grouped in a plurality of sets and bent so as to be inclined to the surface of the plate, substantially as described.

5. A deflector consisting of a sheet of metal having a series of substantially concentric vanes struck up from its surface and inclined thereto, substantially as described.

6. A deflector consisting of a piece of sheet material havingthrough it a number of unobstructed openings and other openings provided with deflecting-vanes inclined at an angle to the plane of the deflector, substantially as described.

7. A deflector consisting of a supportingframework having a series of openings therethrough, vanes for the openings inclined to the plane of the framework and formed integral with said frame, with means for adjusting the inclination of said vanes, substantially as described.

8. A deflector consisting of a supportingframework having a plurality of sets of integral vanes inclined to the plane of said framework, with a device for simultaneously adjusting the angles of inclination of all of said sets of vanes, substantially as described.

9. A deflector consisting of a sheet of metal having integral portions bent so as to form a plurality of series of vanes inclined to its plane, a rod connected to the vanes of each series, with means for moving the rod to vary the angle of inclination of the vanes, substantially as described.

10. A deflector consisting of a sheet of material having two series of vanes inclined at different angles to its surface, rods loosely connected one to the outer edge of each set of vanes, with a nut for simultaneously moving said rods toward and from one another to adjust the angles of inclination of the vanes, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORGE L. THOMPSON. Witnesses:

WALTER GHIsM, J os. H. KLEIN. 

